[doc] list the hf downloaded models

[reidliu41]

$ huggingface-cli scan-cache --help
usage: huggingface-cli <command> [<args>] scan-cache [-h] [--dir DIR] [-v]

options:
  -h, --help     show this help message and exit
  --dir DIR      cache directory to scan (optional). Default to the default HuggingFace cache.
  -v, --verbose  show a more verbose output

$ huggingface-cli scan-cache
REPO ID                                                         REPO TYPE REVISION                                 SIZE ON DISK NB FILES LAST_MODIFIED REFS       LOCAL PATH
--------------------------------------------------------------- --------- ---------------------------------------- ------------ -------- ------------- ---------- -------------------------------------------------------------------------------------------------------------------------------------------------------------
unsloth/Llama-3.2-1B-Instruct                                   model     9b58d4a36161a1e49ecf0a69d20b2736fef8e438         2.5G        6 3 weeks ago   main       /home/xx/.cache/huggingface/hub/models--unsloth--Llama-3.2-1B-Instruct/snapshots/9b58d4a36161a1e49ecf0a69d20b2736fef8e438
unsloth/tinyllama-bnb-4bit                                      model     c6cc31241054c2fe9b4c804f398faffe1254728f       764.8M        7 5 weeks ago   main       /home/xx/.cache/huggingface/hub/models--unsloth--tinyllama-bnb-4bit/snapshots/c6cc31241054c2fe9b4c804f398faffe1254728f
yard1/llama-2-7b-sql-lora-test                                  model     0dfa347e8877a4d4ed19ee56c140fa518470028c        43.6M        9 5 weeks ago   main       /home/xx/.cache/huggingface/hub/models--yard1--llama-2-7b-sql-lora-test/snapshots/0dfa347e8877a4d4ed19ee56c140fa518470028c

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